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Definition
| an element found in the first column of the Periodic Table, Group 1, with the exception of hydrogen: lithium, sodium, potassium, rubidium, cesium, and francium; each has an ion charge of 1+ |
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Term
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Definition
| an element found in the second column of the Periodic Table, Group 2: beryllium, magnesium, calcium, strontium, barium, and radium; each has an ion charge of 2 + |
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Term
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Definition
| for any compound, a set of chemical symbols and numbers that identifies the elements it contains and the ratios in which the elements occur |
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Term
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Definition
| a group of elements that has similar properties and will form compounds with similar properties; can also be described as a column or numbered Group in the Periodic Table |
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Definition
| an element found in the second-last column of the Periodic Table, Group 17: fluorine, chlorine, bromine, iodine, and astatine; each has an ion charge of 1 – |
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Term
| Law of Definite Proportions |
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Definition
| the law that states that a specific compound always contains the same elements in definite proportions |
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Term
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Definition
| an element that has more than one possible ion charge; occurs only after atomic number 20 |
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Definition
| an element found in the last column of the Periodic Table, Group 18: helium, neon, argon, krypton, xenon, and radon; each has an ion charge of 0 |
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Term
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Definition
| long group of atoms that occur together in a compound and are treated as a single element; have a charge like an ion due to an imbalance of electrons and protons |
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